diff --git a/PSR12NeutronRuleset/Sniffs/Strings/ConcatenationUsageSniff.php b/PSR12NeutronRuleset/Sniffs/Strings/ConcatenationUsageSniff.php
index 03a304b..bb72d6c 100644
--- a/PSR12NeutronRuleset/Sniffs/Strings/ConcatenationUsageSniff.php
+++ b/PSR12NeutronRuleset/Sniffs/Strings/ConcatenationUsageSniff.php
@@ -35,7 +35,7 @@ public function register()
      *
      * @return void
      */
-    public function process(File $phpcsFile, int $stackPtr)
+    public function process(File $phpcsFile, $stackPtr)
     {
         $phpcsFile->addError('Concat operator is prohibited', $stackPtr, 'NotAllowed');
     }